The Dexes / Satellite Decay / 49330
CelestialObjectDex · Satellite Decay
SHIJIAN-21 (SJ-21)
49330 · 2026-04-03T17:42:20Z
Fixes
247
Observations
247
The record
Everything the slot carries, as measured. Series arrays are drawn above and listed here in full.
| start_utc | 2026-04-03T17:42:20.050848+00:00 |
|---|---|
| end_utc | 2026-08-09T06:54:58.084128+00:00 |
| family | celestialdex |
| norad_id | 49,330 |
| object_name | SHIJIAN-21 (SJ-21) |
| group | active |
| eccentricity_median | 0.005 |
| inclination_deg_median | 5.090 |
| n_snaps | 247 |
| span_days | 127.550 |
| mean_motion_first | 1.003 |
| mean_motion_last | 1.003 |
| delta_mean_motion | -0.000 |
| altitude_first_km | 35786.085 |
| altitude_last_km | 35788.481 |
| decay_rate_rev_day2 | 0.000 |
| altitude_decay_km_day | -0.002 |
| decay_note | mean_motion slope (rev/day^2) and altitude slope (km/day) from least-squares fit of measured GP elements; altitude from Kepler a=(GM/n^2)^(1/3) - R_earth |
| first_utc | 2026-04-03T17:42:20.050848+00:00 |
| last_utc | 2026-08-09T06:54:58.084128+00:00 |
| last_fix_utc | 2026-08-09T06:54:58.084128+00:00 |
| provisional | false |
| track | [{"utc":"2026-04-03T17:42:20.050848+00:00","mean_motion":1.00273605,"altitude_km":35786.085,"eccentricity":0.0047537,"inclination_deg":4.9377},{"utc":"2026-04-04T06:08:38.620320+00:00","mean_motion":1 |
| total_sensor_hits | 0 |
Provenance
- celestrak
Storage: dossier · celestial_storehouse/satellite_decay/49330.json